network: Use new util function to check name

New util function virXMLCheckIllegalChars is now used to test if
parsed network contains illegal char '/' in it's name.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/conf/network_conf.c

@@ -2117,11 +2117,8 @@ virNetworkDefParseXML(xmlXPathContextPtr ctxt)
         goto error;
     }
 
-    if (strchr(def->name, '/')) {
-        virReportError(VIR_ERR_XML_ERROR,
-                       _("name %s cannot contain '/'"), def->name);
+    if (virXMLCheckIllegalChars("name", def->name, "/") < 0)
         goto error;
-    }
 
     /* Extract network uuid */
     tmp = virXPathString("string(./uuid[1])", ctxt);